Radiation Fin Temperature Rise Abnormality - Daikin SkyAir RZR-TA Series Service Manual

Troubleshooting by Error Codes

4.40 Radiation Fin Temperature Rise Abnormality

L4
Error Code
Applicable All outdoor units
Models
Method of Error The radiation fin temperature is detected by the radiation fin thermistor.
Detection
Error Decision
The radiation fin temperature exceeds a certain temperature.
Conditions
Supposed
 Activation of radiation fin thermistor
Causes  Defective outdoor main PCB
 Defective radiation fin thermistor
Troubleshooting
268
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Is the radiator fin
temperature greater than the
designed temperature?
NO
Does the
connector X111A of fin
thermistor connect to the
outdoor unit PCB
correctly?
YES
Connect to the power.
Does the remote
controller display error code
P4?
NO
When the unit starts
operating, is the error code L4
displayed again?
NO
YES
Defective radiation from the power
unit
• Blocked air suction port
• Stained radiation fin
• High outdoor air temperature
NO
Connect correctly.
YES
Go to P4 troubleshooting.
YES
Replace the outdoor main
PCB (A1P).
Keep operating.
SiUS281811EA
Part 6 Service Diagnosis